The metric used to evaluate the performance of a solution is http://www.mathworks.com/matlabcentral/fileexchange/34754-calculate-size
As you can see if you inspect the code, it has nothing to do with speed or memory. That is why I proposed this solution, in order to show that you can become the leader with a code that is not efficient at all, either in execution speed or in memory use. Although I think the idea of Cody is great and challenging I believe that the metric that is used nowadays should be rethought.

Congrats, you found a way... but not the one I was expecting. Someone called "game" is preventing you from passing the test suite. "game" is somehow stored in memory (see "inmem"). Try unloading it. Hope this helps